TPTI-09-02: VMWare VMnc Codec Open-DML Standard Index dwSize Heap Overflow

Type securityvulns
Reporter Securityvulns
Modified 2009-04-08T00:00:00


TPTI-09-02: VMWare VMnc Codec Open-DML Standard Index dwSize Heap Overflow Vulnerability April 6, 2009

-- CVE ID: CVE-2009-0910

-- Affected Vendors: VMWare, Inc.

-- Affected Products: VMWare, Inc. VMWare Server VMWare, Inc. VMWare ACE VMWare, Inc. VMWare Player VMWare, Inc. VMWare Workstation

-- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of multiple VMWare products. User interaction is required in that a user must visit a malicious web page or open a malicious video file.

Upon installation VMWare Workstation, Server, Player, and ACE register vmnc.dll as a video codec driver to handle compression and decompression of the fourCC type 'VMnc'. This format is used primarily by Workstation to capture remote framebuffer recordings of sessions within a virtual machine. The resulting video is stored within an AVI container file. While playing back such files the function responsible for handling ICM_DECOMPRESS driver messages implicitly trusts a size value while decompressing a frame. Specifically, the dwSize element within an Open-DML standard index RIFF chunk is used as an argument to a memcpy into a static heap buffer. This can be leveraged to execute arbitrary code on the host system under the context of the current user.

-- Vendor Response: VMWare, Inc. has issued an update to correct this vulnerability. More details can be found at:

-- Disclosure Timeline: 2009-02-16 - Vulnerability reported to vendor 2009-04-06 - Coordinated public release of advisory

-- Credit: This vulnerability was discovered by: * Aaron Portnoy, TippingPoint DVLabs